<template>
  <div>
    <h2>随机点名</h2>
    <div class="box">
      <span>名字是：</span>
      <div class="qs">{{name}}</div>
    </div>
    <div class="btns">
      <button class="start" @click="begin">开始</button>
      <button class="end" @click="end">结束</button>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      list :['关羽','张飞','赵云','马超'],
      name:'这里显示名字',
      timer : ''
    }
  },
  methods : {
    begin() {
      this.timer =setInterval(() => {
       let random =Math.floor(Math.random()* this.list.length)
      this.name = this.list[random]
      },100)
    
    },
    end() {
      clearInterval(this.timer)
    }
  }
};
</script>

<style>
* {
  margin: 0;
  padding: 0;
}

h2 {
  text-align: center;
}

.box {
  width: 600px;
  margin: 50px auto;
  display: flex;
  font-size: 25px;
  line-height: 40px;
}

.qs {
  width: 450px;
  height: 40px;
  color: red;
}

.btns {
  text-align: center;
}

.btns button {
  width: 120px;
  height: 35px;
  margin: 0 50px;
}
</style>